Concrete-mold.



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D am 4 m QW K "lung 'IFHII APPLIGATION FILED APR.1, 1905.

A. FOSTER & M. L. JONES. CONCRETE MOLD i g i t, 2 5

"UNITEDISTATESQ PATENT OFFICE.

Specification of Lettersl i'atent.

Patented May 8, 1906.

Applieation filed April 1, 1905'. Serial No. 253,223.

To all whom it may concern:

Be it known that we, AARON T. Fos'rER and MARTIN L. ONES, citizens of the United States, residing at'Chillicothe, in the county of Ross and State of Ohio, have invented certain new and useful Improvements in Concrete-Molds', of which the following is a specification. i V Our inventionrelates to a new and useful improvement in concrete-molds, and more articularly to molds for producing monoithic walls. The object of the invention is to provide a mold of the sectional or knockdown type" in which the side boards are held rigidly in posi-' tion between interlocking clamps, the latter being adapted to readily fit together and to.

be easily and expeditiously disengaged from T each other.

1 Another feature resides in the means for holding the clam s in contact with the side boards and the atter in pro er relation to each other and also means Orplacing the parts of the mold under tension. I

Finally, the object of the invention is to provide a device of the character described that will be strong,'durable, efficient, simple,

and com aratively inexpensive to make and one in w 'ch the several parts will not be lia-- ble to get out of working order.

With the above and other objects in view the invention consists of the novel details of construction and operation, a referable embodiment of which is describe in the specification and illustratediin theaccomnanyin drawings, wherein Figure 1 is a side elevation of a section of our mold, showing the clamps in osition. Fig. 2 is a plan view of the same. ig. 3'is a partial elevation of the opposite side .from

vertical sectional view taken on'the line w 15 of Fig. l, and Fig. 5 is a verticalsection taken through one. of the clamps and itstension means and showing a portion of:one of the wires engagement therewith.

" In the drawings. the numeral 1 designates the side boards, which, it is understood, are to be of such length as the occasion may require,

and in; constructing walls of considerable length it is understood that these side boards are arranged in sections, having their ends abutting. However, 'for the purposes of illustration we have deemed it suflicient to only show one of these sectionsand the parts joint with the meeting edges of the boards and boards on each side of the moldwill have the nary wall it will generallybe found that six side boards, three'on each side,-

'll be sufficient, although it is understood that a greater number of boards maybe employed, if desired. The boards are arranged as stated, three on each side and one above the other in courses or tiers, as shown in Figs. 1, 3, and 4. In

setting up the mold the width of the wall is first determined and then short blocks 2, having a width equal to the predetermined width of the walkare provided. These blocks are placed at the ends and in. the center at the top and bottom of each board, so as to break to extend between the upper sides of the upper boards and the lowersides of the lower boards, as clearly shown in Fig. 4. In this manner the space produced between the side width of the finished wall. To hold the boards in position, we provide clamp mem. bers 3 and 4, adapted to stand opposite each other. Each clamp member is provided at one end with separated lugs 5, projecting be- 80 yond its end and adapted to receive a central ug 6, formed on the adjacent end of the next adjacent clamp member, it being understood that each clam member is thus formed at one end with a single lug 6 and at its opposite end with separated lugs 5, provided'at each side. The lugs are offset, as indicated in Figs 4 and 5, so that when they are brought into interlocking engagement their projecting portions will engage over the outer surfaces of the clamps and allow the inner surfaces of the same to lie flush and in direct contact with These clamps are so arv the side boards 1. ranged as to cause their interlocking ends to mutually engage in the center ,of-the' side boards or between the u per and lower edge of each board, thereby hringing the central or solid portion of each clamp opposite the meeting edges of two ad'acent boards, an thereby break joining with the same.

The clampsv 4 on one side are formed central with grooved bosses 7 and also with central openings 8, extending through the clamps and communicatin with thegrooved portions of the bosses. ires 9 arepassed v between the meeting edges of the boards through the openin 8 and fastened about the said bosses7. he clamps 3 on the .o.t liei"-- side of.the mold are-constructed to receive the said wires 9, which extend across the mold 110 and in this way hold the board's together. The clamping members on-the opposite side ted. The screw is formed on its inner end Wires 9 is passed through t e hollow screw considerable tension can be placed on the from the bosses 7-and15'and the clamps rethat the uppermost clamps will always project half their length above the uppermost tending from opposite sides'ofthe opening 11 4 ably in the bore 11, but holding the screw 12 .about the same, the wire-being drawn as from the wall or they may be allowed to re-.

' and it 18 desired to disengage one of the clamps areformed with integral central collar portions 10, each provided with an angular bore 11 in Wl'llOll a hollow screw 12 is loosely fitwith an angular head 13, adapted to fit slidagainst rotation. The hollow screw 12 extends some distance outwardly or beyond the collar 10 and is provided with a win -nut 14, which'bears against the outer end 0 the collar. At its extreme outer end the hollow screw 12 carries a grooved boss 15, similar to the boss 7, but slightly lon er. One of the into the grooved boss 15 and securely caught tight as possible. In this way the mold is assembled and after the wires have been fastened and stretched between each pair of adjacent lugs the wing-nuts 14 are turned so as to draw the hollow bolts 12 outward or away from the Sideboards, which places the wires 9 under tension and draws the side boards 1 and clamps 3 and 4 together, causing the said side boards to firmlyimpinge the space-blocks 2, and thus producing a strong and rigid mold. It will be apparent that wires 9 by turning the wing-nuts 14 and that the boards will be held in position during the tamping of the concrete, which is thrown in between the side boards.

As the concrete is tamped in and its level adually raised the. space blocks 2 are ocked out or removed, so that a practically solid or monolithic wall may be produced. As the wall is built up toward the top of the third board the bottom clamps on each side may be removed by first loosening the wingnuts'14 to relieve the tension of the wires 9 and the ends of the wires then unfastened moved. The lowermost. side board on each side is then removed and placed on top of the uppermost boards and the clamps engaged with the uppermost clamps and the mold built up, as described." It will be apparentboard, thus facilitating the placing of additional-boards as the moldisbnilt up. When the side boards are removed from the wall, the wires 9 may be clipped off and'withdrawn main in the wall and clipped off close-to its sides The clamp members are provided on their and having suflicient depth to receive the wire 9 so that when the tension is relieved from the other the said clamp may be moved either up or down, the Wire being received 111 readily drawn out of engagement with each other. It is obvious that if these grooves 16 were not provided the wire bending in between the inner surface of the clamp and the side boards would cause the clamp to swing outward at its free end, and thus cause the interlocking lugs at the opposite end to bind and prevent the ready disengagement from the adjacent clamp members.

By employing wires instead of rods or the like we are enabled to produce a more satisfactory mold at less expense for the reason that the wire per foot is cheaper than the rods and neither nuts nor headed ends are required. Further, it is practically impossible to clip ofl rods and leave them in the wall, and where they are removed the opening left must be filled from end toend, else the wall will be porous and damp. Where a wire is used, it is 'generall preferable to cli oii the ends of the wire cl and allow it to remain therein, as it serves to tie the particles of concrete together and strengthen the wall. However, if it is re-. moved such a small opening is left through the wall that by plugging it at eachend satisfactory results are had. Another novel feature of our invention resides in the interlocking of the clamp members, as it will be obvious that when two or more of the members are interlocked at their ends they will be as rigidly connected as if made in a single piece and when caused to lie flat on the side ose up to the wal boards cannot possibly have any lateral" movement independent of each other. 7 Having now fully described our invention,

what we claim, and desire tor secure by Let ible members passing betweenthe adjacent edges of the said side boards and being engaged by members upon the opposite side of said mold adaptedto place said connecting members under tension, said flexible .connecting members being adapted to remain in the said monolithic structure and to form a part thereof.

2. A'clamping device for monolithic molds comprising opposed clamp members each having two projections at one end and a single projection at the other end, said projections adapted to interlock when the clamp members are assembled, and means for drawing the clamp members into clamping relation.

3. In a device of the character described, the combination with a plurality of super- 65 the groove, and thus allowing the lugs to be 1 imposed side boards, of a plurality of clamp- 0 I "in members lecated upon the eX-fieriei' of Said ingablapted jzo' remain i ntbe said monolithic -si e boards and adapted to interlock with structureand to form a part thereof.

1 each other; a' plurality cof-conne cting mem- In testimony whereof We @fiix our signabers engaging 'the elem ing members upon tures in presence of two Witnesses.- 5 one side of 'the mold; sii dconnecting melr n- AARON T FOSTER bets-passing between the adjacent edges of .the-sid boardsend being engagedby de- I v'1ces mgon' the opposite side of-said 'mold Witnesses-1 v adapte to place said comnecbi'ngmembers LOUIS DAY, 1 under'tension, s gmembers be- .LILLIAN-OIFLYNN.

MARTIN L. JONES. 

